This tutorial provides thorough introduction of Hadoop. The tutorial covers what is Hadoop, what is the need of Hadoop, why hadoop is most popular, Hadoop Architecture, data flow, Hadoop daemons, different flavours, introduction of Hadoop componenets like hdfs, MapReduce, Yarn, etc.
Hadoop is an open source tool from the ASF – Apache Software Foundation. Open source project means it is freely available and even its source code can be changed as per the requirements. If certain functionality does not fulfill your requirement, you can change it according to your need. Most of Hadoop code is written by Yahoo, IBM, Facebook, Cloudera.
Read more at Data Flair
